baber/WOPTO huggingface dataset:
Patent GB-290033-A (GB)
Title: Improvements in or relating to electric protective arrangements for a.c. power circuits
IPC: H02H3/30
Filed: 1927-04-28
Abstract: 290,033. Electrical Improvements, Ltd., and Beard, J. R. April 28, 1927. Cut-out arrangements.-In protective systems of the Merz-Price type for A.C. circuits, in order to make use of D.C. relays which are more sensitive than A.C. relays, and in order to avoid the effect of capacity currents in the pilot wires, the pilot wire current is rectified, preferably by means of copper oxide film rectifiers. This rectification may be made at the relays as shown in Fig. 1, where the relays D are connected across rectifiers E in the pilot circuit so that one halfwave flows through one relay and the other halfwave through the other. Two rectifiers may be provided for each relay which are then of the two-coil type and each relay receives doublewave rectified current. The rectification may be made at the current transformers, as in Fig. 4, in which a Wheatstone bridge arrangement of rectifiers F is employed so that, when the balance is disturbed on fault, direct current flows through the coils J of the relays. The rectifiers must permit a certain amount of current to flow in the reverse direction in order to ensure a current in one direction or the other on fault, and if the resistance of the rectifiers in the reverse direction is too high they are shunted by an external resistance K. Another means for overcoming this difficulty is shown in Fig. 6, in which each current transformer supplies rectified current to one winding O of each of the two relays, three pilot wires being used. The other transformer supplies the other two windings 0'. The two windings O, 0' of each relay are normally balanced against one another and, on fault, the balance is upset. Where the A.C. pilot wire current is rectified at the transformers, the difficulty arises that the arrangement would not function in the case where the current at one end while of the same magnitude so that at the other is reversed in phase in relation thereto. This difficulty is overcome by the arrangement shown in Fig. 8 in which the secondary voltage of each current transformer T, T<1>, T<2> is combined with another voltage derived from a. potential transformer secondary U<2>, U, U<1>, the current transformer secondary being in series with the potential transformer secondary in the lagging phase. The resultant voltage, dependent both on the magnitude and the phase of the primary current, is rectified by means of groups of rectifiers V, V<1>, V<2> and applied to the pilot wires W, W<1>, W<2> and to the relays X, X<1>, X<2>. On fault a current flows in the pilot wire circuit and operates the relays. The invention is applicable also to the Merz-Price circulating-current system. The D.C. relays must have a time function sufficiently large to render their operation independent of the fluctuations arising from the use of rectified current.
Patent GB-883938-A (GB)
Title: Improvements relating to x-ray film cassettes
Inventor: TURBY DENNISH CHARLES
IPC: G03B42/04
Filed: 1957-04-08
Abstract: 883,938. X-ray film cassettes. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. March 12, 1958 [April 8, 1957], No. 11387/57. Drawings to Specification. Class 98(1). An X-ray film cassette includes two resilient compression pads between which the film and one or more intensifying screens are sandwiched at least the pad which is in front of the film being transparent to X-rays and the rear pad being secured to the rear wall of the cassette. The pad in front of the film may be secured to the rear of the front plate of the cassette and the film may be carried between two intensifying screens.
Patent GB-352534-A (GB)
Title: Improvements in and relating to tents and the like and to means for transporting thesame
IPC: E04H15/06
Filed: 1930-04-10
Abstract: 352,534. Tents; caravans. MANNING, F. W., Woodside, Ernest Road, Hornchurch, Essex. April 10, 1930, No. 11455. [Class 20 (i).] A combined tent and trailer vehicle, of the kind in which the box-like body of the trailer houses all the tent fittings and is closed by two half-lids which, when opened out horizontally, provide two beds and also support the tent poles, has sockets at the corners of the lid flaps a<1> to receive the tubular supporting members c for the tent fabric. The corner joints of the tent frame comprise members d<1>, f assembled in the manner indicated in Fig. 4, and the members d<1> are secured to the ridge-pole e<1> by wing nuts at the ends of the pole. According to the Provisional Specification, the end frameworks of the tent may each comprise four tubular members, two of which are arranged as an inverted V to support the ridge-pole, the lower ends of the members being secured in sockets at the corners of the lid-flaps, and the other two are intermediate uprights, between the centre and sides of the tent, on which rest intermediate fabricsupporting poles parallel to the ridge-pole.
Patent GB-899947-A (GB)
Title: Process for the manufacture of very pure crystalline silicon carbide
IPC: C01B31/36
Filed: 1959-04-03
Abstract: SiC is prepared by thermal decomposition in the gaseous state of an alkyl silane or an alkyl halogen silane having an atomic ratio of carbon to silicon of 1:1.  Silanes may be mono-methyl silane, trichloromethyl silane, methyl pentachlorodisylmethane, or mono-, di-, or tri-, chloro methyl silanes or mixtures thereof reduced with LiAlH4.  The decomposition may be effected at 600 DEG -2500 DEG C. under sub-, or super-, atmospheric pressures, e.g. 1/1000-5 atmospheres, and may be in the presence of a diluent gas, e.g. a rare gas (argon is mentioned), H2, N2, CO or mixtures thereof, the proportion of diluent gas being advantageously 99-30%. Silicon-hydrogen, silicon-halogen, or silicon-halogen-hydrogen compounds in amount 0,1-10% may also be added.  The SiC product may be subsequently heated to 1600 DEG -2000 DEG C. in inert atmosphere or in vacuo.  The SiC may be deposited on one, or more, heated shaped bodies of Si, SiC, or graphite, or in, or on, liquid Si from which the SiC can be recovered by etching the Si.  The bodies are heated by high frequency, or resistance, heating or electron torch.  An element of Groups 2 to 6 may be incorporated continuously, or discontinuously, in the SiC lattice from gaseous, or vaporous, materials, e.g. halides, hydrides, oxides, or sulphides of these elements, to impart electrical, &c., properties in producing semiconductors.  Such materials may be N2, NH3, vaporizable N2 compounds, AlCl3, PCl3 BCl3, or boron hydride.  SiC tubes may be prepared by precipitating the SiC on a graphite rod, and heating to incandescence in air at 800 DEG -1000 DEG C.
Patent GB-753571-A (GB)
Title: Improvements relating to animal traps
IPC: A01M23/20
Filed: 1953-04-27
Abstract: 753,571. Animal traps. LAPWORTH, F. April 27, 1954 [April 27, 1953], No. 11517/53. Class 5 (1). An animal trap comprises a box 1 provided with a sliding door 2 held in the open position by a catch 7 fixed on a pivoted platform 4. A roller 11 is provided on the catch 7 and engages under a lip 12 on the door. The door is held in the closed position by a foot 13 which engages springs 14. A spike 6 for use in mounting bait is provided on the platform 4.
Patent GB-309867-A (GB)
Title: Improvements in variable-speed gearing
IPC: F16H33/08
Filed: 1929-04-15
Abstract: 309,867. Sturbelle, L. C. April 16,1928, [Convention date]. Variable-speed gearing comprises inertia. masses 53, Fig. 1, supported on ball bearings 55 upon the cranks 56 &c. of a loose crankshaft 56<1> in line with driving and driven shaft 1, 5. Each mass 53 is connected by a drag link 52 to a bar 51 projecting from the face of a disc 50 fast on shaft 1. The crank shaft is thus yieldingly oscillated such oscillation being imparted to a bevel gear 68 integral with the web 69 of the last crank 56. There is a companion gear 72 connected to gear 68 through idlers 89, and ratchet clutches 73 within these gears drive the shaft 5 alternately in the same direction at a speed which varies with the load. Each one-way clutch 73 comprises rollers &c. 74, Fig. 4, controlled by a cage 75, and the direction in which the shaft 5 is driven is reversed by the axial sliding of a sleeve 84, Fig. 1, having a helical slot 83 engaged by a pin 82 on a central control rod 80. The Specification as open to inspection under Sect. 91 (3) (a) comprises a modification shown in the (Cancelled) Figures 1, 2, 3, and 5. Planetary masses 9, 10, supported between slotted discs 6 fast on a driving-shaft 1 roll round inside annular levers 11, 12. These levers 11, 12 are thus rocked about pivot bolts 14 to which they are secured. A spider frame 17 which carries the bolts 14 is through a flange 4 secured to the driven shaft 5 of the gearing. On the end of each bolt 14 is a lever 19, Fig. 3, connected at its free ends by links 21, 22 to two discs 28 and 24, Fig. 1, respectively. The discs 28, 24 are prevented from turning backwards, so that on each swing of the bolts 14, one or other of these discs becomes a fixed abutment, and the spider 17 turns steadily in one direction. The effect of the masses 9, 10 is yielding so that the speed of the -shaft 5 varies with the load. There are two abutment rings 32, Figs. 1 and 5, fixed inside a frame member 44. These are connected through two one-way ball or roller detents 30 to the discs 28, 24 respectively. The detents are controlled each by moving a cage 34, Fig. 5, and the direction in which the shaft 5 is driven can be reversed by operating a lever 45, Fig. 1. In order to limit the stroke of the levers 11, 12, each lever is connected by a toothed sector 47 to a mass 49, which rocks through a definite angle only. Another arrangement comprises the same parts between the pivot bolts 14 and the driven shaft 5, but the inertia masses are adapted to oscillate upon cranks or eccentrics upon a revoluble intermediate shaft in line with driving and driven shafts. This subject-matter does not appear in the Specification as accepted.
Patent GB-434502-A (GB)
Title: Improvements in or connected with mountings for optical observation instruments
IPC: G02B23/16
Filed: 1934-04-18
Abstract: 434,502. Mountings for optical instruments. BARR & STROUD, Ltd., and MACGILL, C. D., Caxton Street, Anniesland, Glasgow. April 18, 1934, No. 11642. [Class 97 (i)] An optical observation instrument, e.g. a rangefinder or height finder, and the mounting in which it is adjustable in elevation are turnable together in azimuth under control of below waist movements of a standing observer. As shown a control arm C over which the observer stands astride, is pivoted at 2 to the mounting B rotatable in azimuth and carrying a rangefinder A. The arm C is urged to take up a vertical position when not in use by a counterweight 3, or by tension or torsion springs. A dashpot may be provided and the arm C may be in two parts hinged together. Alternatively the mounting may have a pair of arms forming a fork in which the observer stands or a single arm terminating in a fork which embraces one thigh. Adjustments to suit the height or girth of the observer may be provided.
Patent GB-494248-A (GB)
Title: Improvements in and connected with adjustable windscreens for use in conjunction with guns, cameras, and other instruments mounted on aircraft
IPC: B64D7/02
Filed: 1937-04-23
Abstract: 494,248. Aircraft windscreens. VICKERS (AVIATION), Ltd., and WALLIS, B. N. April 23, 1937, Nos. 11643/37 and 7484 /38. [Class 4] [Also in Groups XXI and X] Relates to adjustable windscreens for closing slots in aircraft traversed by guns or similar instruments mounted independently of the screen to move about a fixed training axis and also about an elevational axis. According to the invention, the screen is flexible or articulated and has a slot through which the gun projects so that the gun moves the screen during training in guides whish conform to the streamline form of the nose or tail of the aircraft, notwithstanding the fact that the gun moves' about a fixed training axis. Fig. 4 shows the body of the aircraft formed of fixed upper and lower portions a, b, the upper portion being transparent. The flexible band c, formed of sheet metal, c<5> with vertical stiffeners c<6>, is guided by rollers in tracks a<1>, b<1> on the fixed portions a, b. A pair of guns d mounted for training about a vertical pivot f<6>, Fig. 3, and for elevation about trunnions f<5> protrude through vertical slots in the screen covered by rubber strips e which overlap at the slot centres. The gun mounting is ,connected with the screen by telescopic spring-controlled extensions f<1>, f<2>. The flexible band is constituted by a central portion c and end portions g, g<1> connected by hooks g<2> with the central portion the arrangement being such that, as the band moves round to the extreme positions, the end portions are side-tracked into the enlarged guides b<2> and the hooks g<2> are automatically disconnected to enable the centre portion of the band to pass the side portions. The hooks are automatically re-engaged when the motion of the band is reversed. The gunner's seat i is fixed behind the gun mounting on outriggers i<1>. The invention is stated to be applicable to the mounting of cameras and camera guns.
Patent GB-641319-A (GB)
Title: A toy gun or cannon
IPC: A63H5/04
Filed: 1948-04-28
Abstract: 641,319. Toy guns. BRITAINS, Ltd., and HANDLEY, T. J. April 28, 1948, No. 11693. [Class 132 (iii)] A toy field gun comprises a carriage A mounted on wheels W and a projectile-ejecting gun B which has parts 5, 6 simulating a barrel and recoil mechanism respectively and is provided with opposed trunnion pins 1 adapted to be retained in grooved seatings 2 in side plates 3 of the carriage A by a strap 4, the latter depending from the gun and being engaged by the axle 15 of said wheels W; as shown, the ends of the axle 15 are preferably received in slots 16 formed in bosses 14 on the plates 3. The gun barrel 5 is fitted with a spring-pressed firing pin 20 with striker head 22, the outer end 23 of the pin 20 being bent to provide a trigger control which may be engaged with the rear of the breech block during loading.
Patent GB-578031-A (GB)
Title: Improvements relating to overload protector devices for electric refrigerator motors
IPC: F25B49/02
Filed: 1944-06-20
Abstract: 578,031. Refrigerating systems. CONSTANTINE, W. W. (General Motors Corporation). June 20, 1944, No. 11694. [Class 29] [Also in Group XXXVII] A thermal overload switch for protecting refrigerator motors of the sealed motor compressor unit type has means for increasing the permissible overload when the refrigerant pressure in the sealed unit rises and for increasing the time delay between successive abortive attempts at starting. In Fig. 1, the sealed unit 20 is connected by a tube 30 to the low pressure evaporator tube 40 and the pump feeds an expansion valve 38 through a condenser tube 36. The bimetallic strip 42 which is heated bv an element 44 in series with the motor, is attached at its free end by a pair of springs 48 to two ears on a rigid arm 50, the other end of which is riveted by the moving contact 52 to a flexible strip fixed to a post 56 at its other end. The arm 50 is moved up or down according to whether the pull of the springs is above or below the centre-line position. On a rise of temperature the arm is pulled down and the flexible strip is bent up to open the contact. The bimetallic strip 42 is carried on a rigid bar 72, flexibly mounted at one end on a post 75 and actuated at its free end between adjustable stops 88, 90, against an adjustable spring 84, by a bellows 80 connected through a tube 82 to the sealed unit. As the vapour pressure rises its cooling properties improve and the expansion of the bellows raises the bar 72 and increases the protector rating. To protect the motor against too frequent automatic attempts at restarting, the resetting adjusting screw 92, limiting the opening motion of the contact, is mounted on a bimetallic strip 94 heated by an element 70 in series with the starting winding 28 of the motor. Successive attempts to start heat the bimetallic strip and so raise the screw 92 to produce a longer delay before contact is restored. A modification is described, Fig. 2 (not shown), in which the sealed unit is connected to the high-pressure side of the expansion valve and the heater giving protection against successive restarting attempts is connected in parallel with the starting winding of the motor.
Patent GB-400644-A (GB)
Title: Improvements in methods of removing impurities from coal
IPC: B03B9/00
Filed: 1932-04-23
Abstract: Before treating coal to remove adventitious matter and to reduce the ash content, the coal is given a preliminary washing with water to remove only the very finely divided argillaceous and like particles, the water and finely divided particles being preferably drained from the coal through a screen of very fine mesh.  The coal may first be crushed and screened and then subjected to an air blast to remove some of the clay &c.  The preliminary washing may be carried out in a mixing box or trough which may be reciprocated or otherwise agitated and which has a bottom formed of a very fine mesh screen, the coal being sprayed with water while in the box or trough.  Alternatively the coal and water may be passed in at one end of a mixing box or trough in which the mixture is agitated by reciprocating rakes or by revolving arms mounted on a vertical or a horizontal axis, the coal and dirty water passing out at the other end on to a very fine mesh screen, which may be agitated, on which the coal is sprayed with water and through which the clay &c. can pass.  The finely divided particles of clay &c. may be allowed to settle and the clarified water re-used for the preliminary washing.  After the argillaceous matter has been removed the coal is treated to remove dirt &c., e.g. by washing in jigs, in troughs, or by the float and sink method.
Patent GB-268566-A (GB)
Title: Improvements in and relating to abrading, polishing and like machines
IPC: B24B5/38
Filed: 1926-05-05
Abstract: 268,566. Robertshaw, L. G. May 5, 1926. Rollers, spindles, rods, tubes, and the like, treating. - A machine for abrading. polishing, &c. circular rods, bars and tubes consists of two abrading belts 17 mounted on pulleys 18, 19 and passing between adjustable guides 15, the work being rotated and traversed between the belts by feed wheels 12, 13 and similar delivery wheels. The guides have flared edges and at their centre portions are recessed at 16<a> to receive the work. The wheels 12 are mounted on a shaft in bearings 10 supported on a base 7 and adjustable in slots, and the wheels 13 are mounted in similarly adjustable bearings 11, the wheels projecting through slots in inlet and delivery guide tubes 6, 8. By angular adjustment of the wheels, the speeds of feed and of rotation of the work may be varied; this angular adjustment is permitted by mounting the wheels on shafts made in two portions connected by universal couplings one portion of each shaft being driven. The wheels may be faced with rubber; the tension of the belts 17 is adjusted by screws 21. According to the Provisional Specification, the two runs of a single abrasive belt may be employed.
Patent GB-879141-A (GB)
Title: Suspension device
Inventor: STEELE ARTHUR BEEVOR
IPC: F16L3/24
Filed: 1959-04-07
Abstract: 879,141. Supporting cables. STEELE, A. B. April 6, 1960 [April 7, 1959], No. 11785/59. Class 36. [Also in Group XXV] A device for supporting cables in a cradle 2 from a flanged girder 8 comprises a hook member 9 for engaging a flange 7 of the girder, a rod 3 passing through a hole 12 in the hook member and having an end stop 14 limiting its movement through the hole and a clamping bracket 4 arranged to clamp the rod against the other girder flange 13 by the application of a screw member 16. The rod passes through a hole 15 in the bracket 4.
Patent GB-414192-A (GB)
Title: A combined pencial holder and sharpening device
IPC: B43K29/06
Filed: 1933-04-24
Abstract: 414,192. Pen and pencil holders and point - protectors; pocketknives. GRAHAM, J. E., 6, Park View, Queens Road, Teddington, Middlesex. April 24, 1933, No. 11874. [Class 146 (iii).] A pen or pencil holder or pointprotector comprising a slotted tubular member is provided with an internal fitting carrying a pivoted knife-blade adapted to be sheathed in the closed position between two adjacent walls of the fitting. The tubular casing 10 is provided with a longitudinal slot 11 throughout its length. The knife-blade carrier 15 comprises a bent-over cap portion 16 adapted to close partly the upper end of the casing 10, and a downwardly extending U-shaped portion between which the knife-blade 18 is pivoted, on a rivet 19 at the upper end, so that the blade can be opened out through the slot 11 for use; the rivet 19 may be replaced by a loose pin, permitting exchange of blade. The carrier 15 is held in the casing 10 by engagement of protuberances 21 on side wings 20 in corresponding depressions in the wall of the casing; alternatively a projection on the casing engages in a recess in the carrier, and also serves as a stop to prevent contact of the edge of the blade with the wall of the casing. In the case of a point-protector, the carrier 15 may have a conical extension 25 to prevent engagement of the point with the end of the blade. Means may be provided to hold the knife blade in either of its two positions, e.g. a protuberance on the carrier co-operates with two notches in the end of the blade.
Patent GB-965388-A (GB)
Title: Mounting means for electrical equipment
IPC: H02B1/04
Filed: 1963-03-26
Abstract: 965,388. Switch bases; high voltage switches. LA TELEMECANIQUE ELECTRIQUE. March 26, 1963 [April 2, 1962], No. 11946/63. Heading H2B. A high voltage switching assembly is mounted to a conductive rectangular bar 1 by clamping two conductor elements 9, 14 thereof against the opposite outer faces of a pair of interengaging moulded plastics channel sections 17, 18 by insulated bolts 19. The upper channel section 17 has an additional insulating plate 11 separating the element 9 carrying the fixed contact 10 of the switch from a further element 7 attached to a bus-bar 3, these two elements being interconnected through a blow-out coil 8. Various barriers 17d, 18c, 23 extend from the channel sections and serve to increase the length of leakage paths. A plurality of switches can be mounted on a common bar 1 with their respective channel sections in abutting end-to-end relationship, the switches then being automatically adequately spaced.
Patent GB-326688-A (GB)
Title: Improvements in or relating to photographic cameras
IPC: G03B17/44
Filed: 1929-04-17
Abstract: 326,688. Mamiya, S. April 17, 1929. No Patent granted (Sealing fee not paid). Focusing - devices. - Focusing is effected in a camera, fitted with a focal plane shutter by viewing the image thrown by the lens on the shutter through an eyepiece in the back of the camera after reflection in a concave mirror mounted on the front plate, means being provided to close the eyepiece just before the exposure is made. The camera consists of a box 1, Fig. 3, bearing a fixed frame 2 supporting by springs 6 a frame 3 to which the front plate 9 is secured by toggles 10. A pivoted rod 50 engages a ring 51 on the plate 3 and is connected by an arm i, Fig. 1, to the release knob 49 so that when this knob is pressed the lens is moved back a distance equal to that between the focal plane shutter and the sensitive material. At the same time the arm i moves a lever 53 by means of a sprig 54, causing a sliding shutter 43, Fig. 3, to close the viewing aperture 38.
Patent GB-180863-A (GB)
Title: Improved means for holding artificial flies and other fish-hooks
IPC: A01K97/06
Filed: 1921-04-26
Abstract: 180,863. Hardy Bros., (Alnwick), Ltd., and Hardy, J. J. April 26, 1921. Tackle cases.-A resilient fly clip a, adapted to hold a hook in position upon a backing, is formed with an arched projection b, adapted to engage the barbed extremity of the hook and to prevent the shank from assuming an upright position. The fly-clip may be formed as an extension from the lower or upper edge of a base-plate c.